A STUDY ON THERMAL AND HYGRIC BEHAVIOR OF THE SNOWPACK BASED ON FEILD MEASUREMENTS

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  • 野外実験による積雪の熱水分性状に関する研究
  • ヤガイ ジッケン ニ ヨル セキセツ ノ ネツ スイブン セイジョウ ニ カン

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Abstract

To estimate the thermal and moisture property of the snowpack and the underground, field measurements were performed at SAPPORO and NAGAOKA during 1992 - 1993. The temperature at the earth surface never went down below the freezing point of the freewater when the snow covered the ground. It is shown that the annual average values of temperature is almost unique in the ground, and 1. 5℃ heigher than that of the outdoor air at SAPPORO. There was the liquid water in the snowpack which was colder than 0℃ due to the decrease of freezing point in porous media by the capillary pressure.

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